Question

EXERCISE 3: 8. The exam is approaching and you are studying with one of your classmate. They are having troubles understanding the process that leads to a cell membrane resting potential of -70 mV. They know that large intracellular protein anions play a role but they are not sure what the difference is between electrical gradients and concentration gradients. Imagine that the back of this page is the white board in the study space of the second floor of the MSE building. Draw a diagram that explains the establishment of the membrane's resting potential to your classmate. Make sure to include all necessary labels.

Answer 1

Resting membrane Potential : Resting membrane Potential of a Neurom is a tomv. That means potential inside neuron cell is less than outside of the cell. Difference between Electrical gradient and concentration gradient Electrochemical gradient - Gradient for a ion to move across the cell membrane. Electrical gradient- Particles move across the medium membrane according to the difference in charge across the membrane concentration gradient. Particles move across the membrane according to the difference in solure concentration Establishment of membram's (Neural) resting potential cell membrane ttttttttt Poleh Extracellular Intracellular When heuron is at nest its inside is relatively negative os. compared to outside. Concentration of ions can not balanced because on both side because cell membrane selectively allow ichs to pass through the channel. At rest rt ions can easily cross through the membrome. while for ci and Nations in divsicult to cross through hembrane. Negatively charged proteins in side neuron cannot cross membrane. At nest sodium-potasium pump using energy move out 3 Nations in exchange of 2k+ ions. Divveronce between roltage outside and inside neuron givers resting potential which B-Tomv. That means inside of neuron is -700V less than oubide. nost sodium-poto Booteins in side medicult to Covies through the mamby